单项选择题

The weatherman broadcasts the ______ in temperature twice a day.

A．diversion
B．variation
C．variety
D．modification
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Jean Wagner's most enduring contribution to the study of Afro-American poetry is his insist- ence that it ______ in a religious, as well as worldly, frame of reference.
单项选择题
What does the phrase pill poppers mean
A．pill distributors
B．pill manufacturers
C．pill promoters
D．pill takers and abusers
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